The Kepler Cascades is located approximately 2.6 miles south of Old Faithful on the Firehole River in southwestern Yellowstone National Park in the United States. The waterfall's drop is about 150 feet over multiple drops with the longest drop being 50 feet. The cascades are very close to Old Faithful. The waterfalls are off the main road south of the Old Faithful area so it's easy to reach. A handicap-accessible observation deck is also available for a better view. Well worth the stop with an excellent parking area.